Nuclear medicine imaging in the musculoskeletal system with its ability to assess disease activities has contributed to accurate diagnosis and improved medical and surgical treatment. Several nuclear medicine textbooks and case studies in forms of atlases have been published so far, but there seems to be no in-depth nuclear medicine imaging atlas focused on diseases of the musculoskeletal system. Therefore, the authors have written about common cases as well as rare musculoskeletal disorders for which various imaging techniques of nuclear medicine (bone scan, SPECT, SPECT/CT, PET/CT, PET/MR, etc.) are useful based on their clinical experience in many different hospitals. This book intends to share the experiences of the authors with nuclear medicine and radiology residents and board specialists, and to help other clinicians who manage musculoskeletal disorders, such as orthopedic and rheumatology, through various cases of musculoskeletal disorders by providing algorithmic imaging utilization to support their patient care.